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Diffstat (limited to 'embedserv/source/embed/tracker.cxx')
| -rw-r--r-- | embedserv/source/embed/tracker.cxx | 831 |
1 files changed, 831 insertions, 0 deletions
diff --git a/embedserv/source/embed/tracker.cxx b/embedserv/source/embed/tracker.cxx new file mode 100644 index 000000000..00260481c --- /dev/null +++ b/embedserv/source/embed/tracker.cxx @@ -0,0 +1,831 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#include <sal/config.h> + +#include <algorithm> + +#include <sal/types.h> + +#include <stdafx.h> +#include <stddef.h> +#include <syswinwrapper.hxx> + + +static HCURSOR afxCursors[10] = { nullptr, }; +static HBRUSH afxHalftoneBrush = nullptr; + +namespace { + +// the struct below is used to determine the qualities of a particular handle +struct AFX_HANDLEINFO +{ + size_t nOffsetX; // offset within RECT for X coordinate + size_t nOffsetY; // offset within RECT for Y coordinate + int nCenterX; // adjust X by Width()/2 * this number + int nCenterY; // adjust Y by Height()/2 * this number + int nHandleX; // adjust X by handle size * this number + int nHandleY; // adjust Y by handle size * this number + int nInvertX; // handle converts to this when X inverted + int nInvertY; // handle converts to this when Y inverted +}; + +} + +// this array describes all 8 handles (clock-wise) +const AFX_HANDLEINFO afxHandleInfo[] = +{ + // corner handles (top-left, top-right, bottom-right, bottom-left + { offsetof(RECT, left), offsetof(RECT, top), 0, 0, 0, 0, 1, 3 }, + { offsetof(RECT, right), offsetof(RECT, top), 0, 0, -1, 0, 0, 2 }, + { offsetof(RECT, right), offsetof(RECT, bottom), 0, 0, -1, -1, 3, 1 }, + { offsetof(RECT, left), offsetof(RECT, bottom), 0, 0, 0, -1, 2, 0 }, + + // side handles (top, right, bottom, left) + { offsetof(RECT, left), offsetof(RECT, top), 1, 0, 0, 0, 4, 6 }, + { offsetof(RECT, right), offsetof(RECT, top), 0, 1, -1, 0, 7, 5 }, + { offsetof(RECT, left), offsetof(RECT, bottom), 1, 0, 0, -1, 6, 4 }, + { offsetof(RECT, left), offsetof(RECT, top), 0, 1, 0, 0, 5, 7 } +}; + +namespace { + +// the struct below gives us information on the layout of a RECT struct and +// the relationship between its members +struct AFX_RECTINFO +{ + size_t nOffsetAcross; // offset of opposite point (ie. left->right) + int nSignAcross; // sign relative to that point (ie. add/subtract) +}; + +} + +// this array is indexed by the offset of the RECT member / sizeof(int) +const AFX_RECTINFO afxRectInfo[] = +{ + { offsetof(RECT, right), +1 }, + { offsetof(RECT, bottom), +1 }, + { offsetof(RECT, left), -1 }, + { offsetof(RECT, top), -1 }, +}; + + +static HBRUSH HalftoneBrush() +{ + if (afxHalftoneBrush == nullptr) + { + WORD grayPattern[8]; + for (int i = 0; i < 8; i++) + grayPattern[i] = static_cast<WORD>(0x5555 << (i & 1)); + HBITMAP grayBitmap = CreateBitmap(8, 8, 1, 1, &grayPattern); + if (grayBitmap != nullptr) + { + afxHalftoneBrush = CreatePatternBrush(grayBitmap); + DeleteObject(grayBitmap); + } + } + return afxHalftoneBrush; +} + + +static void DrawDragRect( + HDC hDC,LPRECT lpRect,SIZE size, + LPRECT lpRectLast,SIZE sizeLast, + HBRUSH hBrush = nullptr,HBRUSH hBrushLast = nullptr) +{ + // first, determine the update region and select it + HRGN rgnNew; + HRGN rgnOutside,rgnInside; + rgnOutside = CreateRectRgnIndirect(lpRect); + RECT rect = *lpRect; + InflateRect(&rect,-size.cx, -size.cy); + IntersectRect(&rect,&rect,lpRect); + rgnInside = CreateRectRgnIndirect(&rect); + rgnNew = CreateRectRgn(0, 0, 0, 0); + CombineRgn(rgnNew,rgnOutside,rgnInside,RGN_XOR); + + HBRUSH hBrushOld = nullptr; + if (hBrush == nullptr) + hBrush = HalftoneBrush(); + if (hBrushLast == nullptr) + hBrushLast = hBrush; + + HRGN rgnLast(nullptr); + HRGN rgnUpdate(nullptr); + if (lpRectLast != nullptr) + { + // find difference between new region and old region + rgnLast = CreateRectRgn(0, 0, 0, 0); + SetRectRgn( + rgnOutside, + lpRectLast->left, + lpRectLast->top, + lpRectLast->right, + lpRectLast->bottom); + rect = *lpRectLast; + InflateRect(&rect,-sizeLast.cx, -sizeLast.cy); + IntersectRect(&rect,&rect, lpRectLast); + SetRectRgn(rgnInside,rect.left,rect.top,rect.right,rect.bottom); + CombineRgn(rgnLast,rgnOutside,rgnInside, RGN_XOR); + +// // only diff them if brushes are the same + if (hBrush == hBrushLast) + { + rgnUpdate = CreateRectRgn(0, 0, 0, 0); + CombineRgn(rgnUpdate,rgnLast,rgnNew, RGN_XOR); + } + } + if (hBrush != hBrushLast && lpRectLast != nullptr) + { + // brushes are different -- erase old region first + SelectClipRgn(hDC,rgnLast); + GetClipBox(hDC,&rect); + hBrushOld = static_cast<HBRUSH>(SelectObject(hDC,static_cast<HGDIOBJ>(hBrushLast))); + PatBlt(hDC,rect.left,rect.top,(rect.right-rect.left),(rect.bottom-rect.top),PATINVERT); + + SelectObject(hDC,static_cast<HGDIOBJ>(hBrushOld)); + hBrushOld = nullptr; + } + + // draw into the update/new region + SelectClipRgn(hDC,rgnUpdate); + + GetClipBox(hDC,&rect); + hBrushOld = static_cast<HBRUSH>(SelectObject(hDC, static_cast<HGDIOBJ>(hBrush))); + PatBlt(hDC,rect.left, rect.top,(rect.right-rect.left),(rect.bottom-rect.top), PATINVERT); + + // cleanup DC + if (hBrushOld != nullptr) + SelectObject(hDC, static_cast<HGDIOBJ>(hBrushOld)); + SelectClipRgn(hDC,nullptr); +} + + +void winwrap::TransformRect(LPRECT rect,HWND pWnd,HWND pWndClipTo) +{ + POINT pt; + pt.x = rect->left;pt.y = rect->top; + ClientToScreen(pWnd,&pt); + ScreenToClient(pWndClipTo,&pt); + rect->left = pt.x; rect->top = pt.y; + + pt.x = rect->right;pt.y = rect->bottom; + ClientToScreen(pWnd,&pt); + ScreenToClient(pWndClipTo,&pt); + rect->right = pt.x; rect->bottom = pt.y; +} + + +static void NormalizeRect(LPRECT rp) +{ + if(rp->left > rp->right) { + UINT tmp = rp->left; + rp->left = rp->right; + rp->right = tmp; + } + + if(rp->top > rp->bottom) { + UINT tmp = rp->top; + rp->top = rp->bottom; + rp->bottom = tmp; + } +} + + +using namespace winwrap; + + +Tracker::Tracker() +{ +} + + +Tracker::Tracker(LPCRECT lpSrcRect, UINT nStyle) +{ + Construct(); + CopyRect(&m_rect,lpSrcRect); + m_nStyle = nStyle; +} + +static HBRUSH afxHatchBrush = nullptr; +static HPEN afxBlackDottedPen = nullptr; +static int afxHandleSize = 0; + + +void Tracker::Construct() +{ + static bool bInitialized = false; + if (!bInitialized) + { + if (afxHatchBrush == nullptr) + { + // create the hatch pattern + bitmap + WORD hatchPattern[8]; + WORD wPattern = 0x1111; + for (int i = 0; i < 4; i++) + { + hatchPattern[i] = wPattern; + hatchPattern[i+4] = wPattern; + wPattern <<= 1; + } + HBITMAP hatchBitmap = CreateBitmap(8, 8, 1, 1,&hatchPattern); + + // create black hatched brush + afxHatchBrush = CreatePatternBrush(hatchBitmap); + DeleteObject(hatchBitmap); + } + + if (afxBlackDottedPen == nullptr) + { + // create black dotted pen + afxBlackDottedPen = CreatePen(PS_DOT, 0, RGB(0, 0, 0)); + } + + // get default handle size from Windows profile setting + static const WCHAR szWindows[] = L"windows"; + static const WCHAR szInplaceBorderWidth[] = L"oleinplaceborderwidth"; + afxHandleSize = GetProfileIntW(szWindows, szInplaceBorderWidth, 4); + bInitialized = true; + + afxCursors[0] = afxCursors[2] = LoadCursor(nullptr,IDC_SIZENWSE); + afxCursors[4] = afxCursors[6] = LoadCursor(nullptr,IDC_SIZENS); + afxCursors[1] = afxCursors[3] = LoadCursor(nullptr,IDC_SIZENESW); + afxCursors[5] = afxCursors[7] = LoadCursor(nullptr,IDC_SIZEWE); + afxCursors[8] = LoadCursor(nullptr,IDC_SIZEALL); + } + + m_nStyle = 0; + m_nHandleSize = afxHandleSize; + m_sizeMin.cy = m_sizeMin.cx = m_nHandleSize*2; + + SetRectEmpty(&m_rectLast); + m_sizeLast.cx = m_sizeLast.cy = 0; + m_bErase = FALSE; + m_bFinalErase = FALSE; +} + +Tracker::~Tracker() +{ +} + + +int Tracker::HitTest(POINT point) const +{ + TrackerHit hitResult = hitNothing; + + RECT rectTrue; + GetTrueRect(&rectTrue); + NormalizeRect(&rectTrue); + if (PtInRect(&rectTrue,point)) + { + if ((m_nStyle & (resizeInside|resizeOutside)) != 0) + hitResult = static_cast<TrackerHit>(HitTestHandles(point)); + else + hitResult = hitMiddle; + } + return hitResult; +} + + +BOOL Tracker::SetCursor(HWND pWnd, UINT nHitTest) const +{ + // trackers should only be in client area + if (nHitTest != HTCLIENT) + return FALSE; + + // convert cursor position to client co-ordinates + POINT point; + GetCursorPos(&point); + ScreenToClient(pWnd,&point); + + // do hittest and normalize hit + int nHandle = HitTestHandles(point); + if (nHandle < 0) + return FALSE; + + // need to normalize the hittest such that we get proper cursors + nHandle = NormalizeHit(nHandle); + + // handle special case of hitting area between handles + // (logically the same -- handled as a move -- but different cursor) + if (nHandle == hitMiddle && !PtInRect(&m_rect,point)) + { + // only for trackers with hatchedBorder (ie. in-place resizing) + if (m_nStyle & hatchedBorder) + nHandle = TrackerHit(9); + } + + ::SetCursor(afxCursors[nHandle]); + return TRUE; +} + + +BOOL Tracker::Track(HWND hWnd,POINT point,BOOL bAllowInvert, + HWND hWndClipTo) +{ + // perform hit testing on the handles + int nHandle = HitTestHandles(point); + if (nHandle < 0) + { + // didn't hit a handle, so just return FALSE + return FALSE; + } + + // otherwise, call helper function to do the tracking + m_bAllowInvert = bAllowInvert; + SetCursor(hWnd,nHandle); + return TrackHandle(nHandle, hWnd, point, hWndClipTo); +} + + +BOOL Tracker::TrackHandle(int nHandle,HWND hWnd,POINT point,HWND hWndClipTo) +{ + // don't handle if capture already set + if (GetCapture() != nullptr) + return FALSE; + + // save original width & height in pixels + int nWidth = m_rect.right - m_rect.left; + int nHeight = m_rect.bottom - m_rect.top; + + // set capture to the window which received this message + SetCapture(hWnd); + UpdateWindow(hWnd); + if (hWndClipTo != nullptr) + UpdateWindow(hWndClipTo); + RECT rectSave = m_rect; + + // find out what x/y coords we are supposed to modify + int *px, *py; + int xDiff, yDiff; + GetModifyPointers(nHandle, &px, &py, &xDiff, &yDiff); + xDiff = point.x - xDiff; + yDiff = point.y - yDiff; + + // get DC for drawing + HDC hDrawDC; + if (hWndClipTo != nullptr) + { + // clip to arbitrary window by using adjusted Window DC + hDrawDC = GetDCEx(hWndClipTo,nullptr, DCX_CACHE); + } + else + { + // otherwise, just use normal DC + hDrawDC = GetDC(hWnd); + } + + RECT rectOld; + bool bMoved = false; + + // get messages until capture lost or cancelled/accepted + for (;;) + { + MSG msg; + GetMessageW(&msg, nullptr, 0, 0); + + if (GetCapture() != hWnd) + break; + + switch (msg.message) + { + // handle movement/accept messages + case WM_LBUTTONUP: + case WM_MOUSEMOVE: + rectOld = m_rect; + // handle resize cases (and part of move) + if (px != nullptr) + *px = static_cast<int>(static_cast<short>(LOWORD(msg.lParam))) - xDiff; + if (py != nullptr) + *py = static_cast<int>(static_cast<short>(HIWORD(msg.lParam))) - yDiff; + + // handle move case + if (nHandle == hitMiddle) + { + m_rect.right = m_rect.left + nWidth; + m_rect.bottom = m_rect.top + nHeight; + } + // allow caller to adjust the rectangle if necessary + AdjustRect(nHandle,&m_rect); + + // only redraw and callback if the rect actually changed! + m_bFinalErase = (msg.message == WM_LBUTTONUP); + if (!EqualRect(&rectOld,&m_rect) || m_bFinalErase) + { + if (bMoved) + { + m_bErase = TRUE; + DrawTrackerRect(&rectOld,hWndClipTo,hDrawDC,hWnd); + } + OnChangedRect(rectOld); + if (msg.message != WM_LBUTTONUP) + bMoved = true; + } + if (m_bFinalErase) + goto ExitLoop; + + if (!EqualRect(&rectOld,&m_rect)) + { + m_bErase = FALSE; + DrawTrackerRect(&m_rect,hWndClipTo,hDrawDC,hWnd); + } + break; + + // handle cancel messages + case WM_KEYDOWN: + if (msg.wParam != VK_ESCAPE) + break; + [[fallthrough]]; + case WM_RBUTTONDOWN: + if (bMoved) + { + m_bErase = m_bFinalErase = TRUE; + DrawTrackerRect(&m_rect, hWndClipTo, hDrawDC, hWnd); + } + m_rect = rectSave; + goto ExitLoop; + + // just dispatch rest of the messages + default: + DispatchMessageW(&msg); + break; + } + } + + ExitLoop: + if (hWndClipTo != nullptr) + ReleaseDC(hWndClipTo,hDrawDC); + else + ReleaseDC(hWnd,hDrawDC); + ReleaseCapture(); + + // restore rect in case bMoved is still FALSE + if (!bMoved) + m_rect = rectSave; + m_bFinalErase = FALSE; + m_bErase = FALSE; + + // return TRUE only if rect has changed + return !EqualRect(&rectSave,&m_rect); +} + + +void Tracker::OnChangedRect(const RECT& /*rectOld*/) +{ +} + + +void Tracker::AdjustRect(int nHandle, LPRECT) +{ + if(nHandle == hitMiddle) + return; + + // convert the handle into locations within m_rect + int *px, *py; + GetModifyPointers(nHandle, &px, &py, nullptr, nullptr); + + // enforce minimum width + int nNewWidth = m_rect.right - m_rect.left; + int nAbsWidth = m_bAllowInvert ? abs(nNewWidth) : nNewWidth; + if (px != nullptr && nAbsWidth < m_sizeMin.cx) + { + nNewWidth = nAbsWidth != 0 ? nNewWidth / nAbsWidth : 1; + const AFX_RECTINFO* pRectInfo = + &afxRectInfo[px - reinterpret_cast<int*>(&m_rect)]; + *px = *reinterpret_cast<int*>(reinterpret_cast<BYTE*>(&m_rect) + pRectInfo->nOffsetAcross) + + nNewWidth * m_sizeMin.cx * -pRectInfo->nSignAcross; + } + + // enforce minimum height + int nNewHeight = m_rect.bottom - m_rect.top; + int nAbsHeight = m_bAllowInvert ? abs(nNewHeight) : nNewHeight; + if (py != nullptr && nAbsHeight < m_sizeMin.cy) + { + nNewHeight = nAbsHeight != 0 ? nNewHeight / nAbsHeight : 1; + const AFX_RECTINFO* pRectInfo = + &afxRectInfo[py - reinterpret_cast<int*>(&m_rect)]; + *py = *reinterpret_cast<int*>(reinterpret_cast<BYTE*>(&m_rect) + pRectInfo->nOffsetAcross) + + nNewHeight * m_sizeMin.cy * -pRectInfo->nSignAcross; + } +} + + +void Tracker::DrawTrackerRect( + LPRECT lpRect,HWND pWndClipTo,HDC pDC,HWND pWnd) +{ + // first, normalize the rectangle for drawing + RECT rect = *lpRect; + NormalizeRect(&rect); + + // convert to client coordinates + if (pWndClipTo != nullptr) + TransformRect(&rect,pWnd,pWndClipTo); + + SIZE size; + size.cx = 0; size.cy = 0; + if (!m_bFinalErase) + { + // otherwise, size depends on the style + if (m_nStyle & hatchedBorder) + { + size.cx = size.cy = std::max(1,GetHandleSize(&rect)-1); + InflateRect(&rect,size.cx,size.cy); + } + else + { + size.cx = 1; // CX_BORDER; + size.cy = 1; // CY_BORDER; + } + } + + // and draw it + if (m_bFinalErase || !m_bErase) + DrawDragRect(pDC,&rect,size,&m_rectLast,m_sizeLast); + + // remember last rectangles + m_rectLast = rect; + m_sizeLast = size; +} + + +void Tracker::Draw(HDC hDC) const +{ + // set initial DC state + SetMapMode(hDC,MM_TEXT); + SetViewportOrgEx(hDC,0, 0,nullptr); + SetWindowOrgEx(hDC,0, 0,nullptr); + + // get normalized rectangle + RECT rect = m_rect; + NormalizeRect(&rect); + + HPEN pOldPen = nullptr; + HBRUSH pOldBrush = nullptr; + HGDIOBJ pTemp; + int nOldROP; + + // draw lines + if ((m_nStyle & (dottedLine|solidLine)) != 0) + { + if (m_nStyle & dottedLine) + pOldPen = static_cast<HPEN>(SelectObject(hDC,afxBlackDottedPen)); + else + pOldPen = static_cast<HPEN>(SelectObject(hDC,reinterpret_cast<HGDIOBJ>(BLACK_PEN))); + pOldBrush = static_cast<HBRUSH>(SelectObject(hDC,reinterpret_cast<HGDIOBJ>(NULL_BRUSH))); + nOldROP = SetROP2(hDC,R2_COPYPEN); + InflateRect(&rect,+1, +1); // borders are one pixel outside + Rectangle(hDC,rect.left, rect.top, rect.right, rect.bottom); + SetROP2(hDC,nOldROP); + } + + // if hatchBrush is going to be used, need to unrealize it + if ((m_nStyle & (hatchInside|hatchedBorder)) != 0) + UnrealizeObject(static_cast<HGDIOBJ>(afxHatchBrush)); + + // hatch inside + if ((m_nStyle & hatchInside) != 0) + { + pTemp = SelectObject(hDC,reinterpret_cast<HGDIOBJ>(NULL_PEN)); + if (pOldPen == nullptr) + pOldPen = static_cast<HPEN>(pTemp); + pTemp = SelectObject(hDC,static_cast<HGDIOBJ>(afxHatchBrush)); + if (pOldBrush == nullptr) + pOldBrush = static_cast<HBRUSH>(pTemp); + SetBkMode(hDC,TRANSPARENT); + nOldROP = SetROP2(hDC,R2_MASKNOTPEN); + Rectangle(hDC,rect.left+1, rect.top+1, rect.right, rect.bottom); + SetROP2(hDC,nOldROP); + } + + // draw hatched border + if ((m_nStyle & hatchedBorder) != 0) + { + pTemp = SelectObject(hDC,static_cast<HGDIOBJ>(afxHatchBrush)); + if (pOldBrush == nullptr) + pOldBrush = static_cast<HBRUSH>(pTemp); + SetBkMode(hDC,OPAQUE); + RECT rectTrue; + GetTrueRect(&rectTrue); + PatBlt(hDC,rectTrue.left, rectTrue.top, rectTrue.right-rectTrue.left, + rect.top-rectTrue.top, 0x000F0001 /* Pn */); + PatBlt(hDC,rectTrue.left, rect.bottom, + rectTrue.right-rectTrue.left, + rectTrue.bottom-rect.bottom, 0x000F0001 /* Pn */); + PatBlt(hDC,rectTrue.left, rect.top, rect.left-rectTrue.left, + rect.bottom-rect.top, 0x000F0001 /* Pn */); + PatBlt(hDC,rect.right, rect.top, rectTrue.right-rect.right, + rect.bottom-rect.top, 0x000F0001 /* Pn */); + } + + // draw resize handles + if ((m_nStyle & (resizeInside|resizeOutside)) != 0) + { + UINT mask = GetHandleMask(); + HBRUSH hbrush = CreateSolidBrush(RGB(0,0,0)); + for (int i = 0; i < 8; ++i) + { + if (mask & (1<<i)) + { + GetHandleRect(static_cast<TrackerHit>(i), &rect); + // FillSolidRect(hDC,rect, RGB(0, 0, 0)); + FillRect(hDC,&rect,hbrush); + } + } + DeleteObject(hbrush); + } + + // cleanup pDC state + if (pOldPen != nullptr) + SelectObject(hDC,pOldPen); + if (pOldBrush != nullptr) + SelectObject(hDC,pOldBrush); + RestoreDC(hDC,-1); +} + + +void Tracker::GetHandleRect(int nHandle,RECT* pHandleRect) const +{ + // get normalized rectangle of the tracker + RECT rectT = m_rect; + NormalizeRect(&rectT); + if ((m_nStyle & (solidLine|dottedLine)) != 0) + InflateRect(&rectT,+1, +1); + + // since the rectangle itself was normalized, we also have to invert the + // resize handles. + nHandle = NormalizeHit(nHandle); + + // handle case of resize handles outside the tracker + int size = GetHandleSize(); + if (m_nStyle & resizeOutside) + InflateRect(&rectT,size-1, size-1); + + // calculate position of the resize handle + int nWidth = rectT.right - rectT.left; + int nHeight = rectT.bottom - rectT.top; + RECT rect; + const AFX_HANDLEINFO* pHandleInfo = &afxHandleInfo[nHandle]; + rect.left = *reinterpret_cast<int*>(reinterpret_cast<BYTE*>(&rectT) + pHandleInfo->nOffsetX); + rect.top = *reinterpret_cast<int*>(reinterpret_cast<BYTE*>(&rectT) + pHandleInfo->nOffsetY); + rect.left += size * pHandleInfo->nHandleX; + rect.top += size * pHandleInfo->nHandleY; + rect.left += pHandleInfo->nCenterX * (nWidth - size) / 2; + rect.top += pHandleInfo->nCenterY * (nHeight - size) / 2; + rect.right = rect.left + size; + rect.bottom = rect.top + size; + + *pHandleRect = rect; +} + + +int Tracker::GetHandleSize(LPRECT lpRect) const +{ + LPCRECT rect = lpRect == nullptr ? &m_rect : lpRect; + + int size = m_nHandleSize; + if (!(m_nStyle & resizeOutside)) + { + // make sure size is small enough for the size of the rect + int sizeMax = std::min(abs(rect->right - rect->left), + abs(rect->bottom - rect->top)); + if (size * 2 > sizeMax) + size = sizeMax / 2; + } + return size; +} + + +UINT Tracker::GetHandleMask() const +{ + UINT mask = 0x0F; // always have 4 corner handles + int size = m_nHandleSize*3; + if (abs(m_rect.right - m_rect.left) - size > 4) + mask |= 0x50; + if (abs(m_rect.bottom - m_rect.top) - size > 4) + mask |= 0xA0; + return mask; +} + + +void Tracker::GetTrueRect(LPRECT lpTrueRect) const +{ + RECT rect = m_rect; + NormalizeRect(&rect); + int nInflateBy = 0; + if ((m_nStyle & (resizeOutside|hatchedBorder)) != 0) + nInflateBy += GetHandleSize() - 1; + if ((m_nStyle & (solidLine|dottedLine)) != 0) + ++nInflateBy; + InflateRect(&rect,nInflateBy, nInflateBy); + *lpTrueRect = rect; +} + + +int Tracker::NormalizeHit(int nHandle) const +{ + if (nHandle == hitMiddle || nHandle == hitNothing) + return nHandle; + const AFX_HANDLEINFO* pHandleInfo = &afxHandleInfo[nHandle]; + if (m_rect.right - m_rect.left < 0) + { + nHandle = static_cast<TrackerHit>(pHandleInfo->nInvertX); + pHandleInfo = &afxHandleInfo[nHandle]; + } + if (m_rect.bottom - m_rect.top < 0) + nHandle = static_cast<TrackerHit>(pHandleInfo->nInvertY); + return nHandle; +} + + +int Tracker::HitTestHandles(POINT point) const +{ + RECT rect; + UINT mask = GetHandleMask(); + + // see if hit anywhere inside the tracker + GetTrueRect(&rect); + if (!PtInRect(&rect,point)) + return hitNothing; // totally missed + + // see if we hit a handle + for (int i = 0; i < 8; ++i) + { + if (mask & (1<<i)) + { + GetHandleRect(static_cast<TrackerHit>(i), &rect); + if (PtInRect(&rect,point)) + return static_cast<TrackerHit>(i); + } + } + + // last of all, check for non-hit outside of object, between resize handles + if ((m_nStyle & hatchedBorder) == 0) + { + rect = m_rect; + NormalizeRect(&rect); + if ((m_nStyle & (dottedLine|solidLine)) != 0) + InflateRect(&rect,+1, +1); + if (!PtInRect(&rect,point)) + return hitNothing; // must have been between resize handles + } + return hitMiddle; // no handle hit, but hit object (or object border) +} + + +void Tracker::GetModifyPointers( + int nHandle, int** ppx, int** ppy, int* px, int* py) +{ + if (nHandle == hitMiddle) + nHandle = hitTopLeft; // same as hitting top-left + + *ppx = nullptr; + *ppy = nullptr; + + // fill in the part of the rect that this handle modifies + // (Note: handles that map to themselves along a given axis when that + // axis is inverted don't modify the value on that axis) + + const AFX_HANDLEINFO* pHandleInfo = &afxHandleInfo[nHandle]; + if (pHandleInfo->nInvertX != nHandle) + { + *ppx = reinterpret_cast<int*>(reinterpret_cast<BYTE*>(&m_rect) + pHandleInfo->nOffsetX); + if (px != nullptr) + *px = **ppx; + } + else + { + // middle handle on X axis + if (px != nullptr) + *px = m_rect.left + (m_rect.left-m_rect.right) / 2; + } + if (pHandleInfo->nInvertY != nHandle) + { + *ppy = reinterpret_cast<int*>(reinterpret_cast<BYTE*>(&m_rect) + pHandleInfo->nOffsetY); + if (py != nullptr) + *py = **ppy; + } + else + { + // middle handle on Y axis + if (py != nullptr) + *py = m_rect.top + (m_rect.top-m_rect.bottom) / 2; + } +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |